Engineering Backend Systems
for Hundreds of Millions of Users

Leadership: Led 6 engineers directly and 20+ across three teams, owning team-level architecture, hiring, and mentoring, and setting product scope with PM.

Subscription: Built TikTok LIVE Subscription from 0→1 to 25M+ creators and 10M+ active subscriptions across 50+ regions in SEA, US, LATAM, and EMEA.

Subscription: Designed the permission model behind 10+ entitlements (subscriber badges, custom emotes, sub-only LIVE, sub-only video, sub-space), with the relation read path serving 1M+ QPS at 99.999% availability and sub-second consistency between payment and entitlement state.

Subscription: Unified purchase and billing across App Store and Google Play, absorbing divergent SKU structures, order mechanics, and Apple billing version migrations behind one internal model.

Service+: Led an opt-in lead-generation platform for SMB creators spanning DMs, forms, bookings, and paid courses, reaching 30M+ SMBs and 1M+ leads across 30+ regions.

Service+: Built end-to-end creator verification covering KYC, KYB, and industry checks, with machine and human review pipelines plus an appeals path.

Led the backend engineering team to deliver core features for BOOYAH!, a global mobile game live-streaming platform with 1M+ DAU.

Architected high-performance microservices using Go, C++, and gRPC, achieving 99.9% availability and sub-second latency at 100K+ QPS through implementation of multi-IDC failover, adaptive load balancing, and circuit breakers.

Drove multiple performance optimization initiatives, including multi-layer distributed caching, predictive fetching, and adoption of low-latency HLS.

Researched and implemented a multi-IDC live-stream transcoding cluster leveraging FFmpeg with CUDA acceleration, improving price-performance by 16× compared to CPU-based transcoding.

Partnered with ML engineers to launch content-based recommendation systems, increasing CTR by 30% and DAU by 7%.

Designed and built a user connectivity graph using NebulaGraph, enabling multi-account linking, fraud detection, and Anti-Money Laundering (AML) capabilities.

Developed core interactivity features for BeeTalk Live, a mobile-first live streaming application with 100K+ DAU across Southeast Asia.

Implemented a real-time GPU rendering pipeline, achieving 20%+ device load reduction compared to CPU-based solutions, preventing overheating while improving stream smoothness.

Implemented ping-pong FBO rendering based on novel research papers to optimize frame latency, consistently achieving 60+ FPS streams on low-end Android devices.

Proposed and integrated RTMP adaptive bitrate streaming, alleviating 60% stutters under poor network. This solution has since been integrated into the Garena core mobile streaming library.

Implemented centralized configuration platform using Flask and Nginx, enabling dynamic adjustments of streaming hyperparameters for different devices.